Do Plastic Sheds Need a Base?

When setting up a plastic shed in your garden, you might find yourself wondering if a base is necessary. After all, plastic sheds are lightweight and seemingly sturdy on their own. But neglecting to provide a proper foundation can lead to a multitude of problems down the line.

In this guide, we will highlight the importance of a solid base and why it should never be overlooked. Understanding this significance is essential for stability and longevity, so keep reading!

What Are Plastic Sheds?

BillyOh WoodBridge II Plus 10x8ft Apex Plastic Shed with Foundation Kit
BillyOh WoodBridge II Plus 10x8ft Apex Plastic Shed with Foundation Kit

Plastic sheds make an excellent alternative to traditional wooden sheds and metal sheds. They are usually constructed using durable, lightweight materials, such as HDPE and vinyl. And these plastic types aren’t your typical ones.

Plastic sheds are known for their unique attributes, such as:

  • affordability
  • low maintenance requirements
  • resistance to rot, rust, and insect damage

Unlike wooden sheds, they do not require regular painting or staining. Additionally, plastic sheds are easy to assemble and disassemble. This makes them portable and adaptable to changing needs. They also offer excellent resistance to moisture, which adds up to their superiority.

However, plastic sheds also come with a few disadvantages. For one, they may not have the same aesthetic appeal as wooden sheds. Plus, they may not blend as seamlessly into natural surroundings. Plastic sheds may be less durable than their metal counterparts, to add. This is especially true during extreme weather conditions such as strong winds.

To ensure optimal performance, proper installation of plastic sheds is crucial. This is where a solid and level base comes into the picture.

The Importance of a Solid Shed Foundation

Jasmine 8x5ft Plastic Pent Shed with Floor
Jasmine 8x5ft Plastic Pent Shed with Floor

A solid foundation is crucial for any type of shed, and plastic sheds are no exception. Without it, issues can arise, compromising the shed’s stability and functionality.

An inadequate or unstable base can lead to several problems. To start, the shed may become unstable. This can lead to collapse or damage during strong winds or seismic activity. An uneven base can also cause the shed to warp or twist, affecting its structural integrity over time. Moreover, without a solid foundation, water can seep into the shed. In turn, this can result in moisture-related issues like mould and damage to stored items.

Meanwhile, having a proper shed base kit offers several benefits. First, it ensures improved stability. This provides a secure structure that can withstand external forces. Next, a level foundation helps prevent warping. It ensures the shed maintains its structural integrity. Finally, a well-built foundation acts as a barrier against moisture. This helps keep the interior dry, protecting stored items from damage.

Overall, a proper foundation ensures longevity, stability, and protection of your plastic shed.

Different Types Available

There are various types of shed bases suitable for plastic garden sheds:

1. Concrete slab

A concrete slab provides a solid and durable foundation for your garden shed. It involves pouring a levelled layer of concrete directly onto the ground. This type of base offers excellent stability and long-term durability.

However, the construction process requires more labour and expertise. This choice may also be a permanent fixture that can’t be easily relocated.

2. Paving slabs

Using paving slabs is another popular option for a plastic shed base. These slabs can be laid on a levelled surface, creating a stable platform. Paving slabs are relatively easy to install, and they provide good stability. They also offer the flexibility to move or adjust the shed if needed. Additionally, they can enhance the aesthetics of the shed area.

3. Timber frame

Building this base type involves building a wooden framework on which the shed rests. Timber frames are suitable for cases where the ground is uneven or prone to moisture. They allow air circulation underneath the shed, reducing the risk of rot and moisture. They offer versatility in terms of size and can be disassembled and relocated if needed.

Top tip: Opt for tongue and groove wood floor for robust construction.

4. Plastic shed base

Ecobase Fastfit Foundation Base
Ecobase Fastfit Foundation Base

A plastic shed base system consists of interlocking panels made from durable plastic. These panels can be easily assembled on a levelled surface to create a stable foundation.

Plastic shed bases provide excellent drainage, to add. Such qualities prevent water accumulation and protect the shed from moisture-related issues. They are lightweight, easy to install, and can be repositioned if required.

An excellent example of this base type is the Ecobase Fastfit Foundation Base.

Maintenance and Care for Plastic Sheds and Bases

Lifetime 8ftx10ft Special Edition Heavy Duty Plastic Shed
Lifetime 8ftx10ft Special Edition Heavy Duty Plastic Shed

To extend the lifespan of your plastic shed and its base, regular maintenance is key. Here are some tips to keep in mind:

  • Regular inspections: Conduct periodic inspections to check for any signs of damage. This can include cracks, leaks, or warping. Addressing these issues promptly can prevent further damage.
  • Cleaning: Clean the shed regularly using mild detergent and water. Avoid abrasive cleaners that can scratch the surface. Remove debris, leaves, and dirt from the base to maintain proper drainage.
  • Repairs: Repair any cracks or damage to the shed promptly. Use appropriate sealants or repair kits recommended by the manufacturer. Reinforce the base if necessary to maintain stability and level.
  • Protect against UV rays: Apply UV-resistant coatings or paint to protect the shed. This helps to preserve its appearance and structural integrity against fading.

The Benefits of Foundation Kits

One important consideration is whether or not you need a solid base for your plastic shed. These outdoor structures are generally more versatile and low-maintenance compared to wooden ones. But even so, they can benefit greatly from stable shed supports.

Many manufacturers offer foundation kits. These additions are designed to enhance the durability and functionality of the shed. Let’s explore some of the benefits of using a plastic shed with a foundation kit:

1. Stability and durability

Plastic sheds can be susceptible to shifting and damage if not properly anchored. But a shed foundation prevents this from happening. It ensures long-term durability and less ground moisture concerns.

2. Improved structural integrity

BillyOh Ashford Apex Plastic Garden Storage Shed Including Foundation Kit Grey
BillyOh Ashford Apex Plastic Garden Storage Shed Including Foundation Kit Grey

Foundation kits often include reinforced flooring systems. These features distribute weight evenly across the timber shed base, for instance. This added structural support can prevent sagging or warping over time.

Have a look at the BillyOh Ashford Apex model as an example. The included steel foundation kit provides a stable structure, creating a reliable base.

3. Easy assembly

BillyOh Kingston Apex Plastic Shed Light Grey With Floor
BillyOh Kingston Apex Plastic Shed Light Grey With Floor

Foundations for sheds are typically designed for easy installation. They come with all the necessary hardware and instructions. Thanks to this, it makes the assembling a hassle-free process. This can save you time and effort compared to constructing a custom base from scratch.

Even this BillyOh Kingston Apex unit is guaranteed to be easy to assemble! The metal framing is an added bonus, ensuring a strong framework.

4. Protection from moisture

Elevating your plastic shed off the ground with a foundation kit only means one thing. And that is protection from ground moisture and water infiltration. This is especially crucial if your shed houses items susceptible to moisture damage.

5. Enhanced ventilation

Lifetime 8ftx10ft Special Edition Heavy Duty Plastic Shed
Lifetime 8ftx10ft Special Edition Heavy Duty Plastic Shed

Some foundations include features like ventilation grates or built-in airflow systems. This helps improve air circulation within the structure. Moreover, this reduces humidity levels and prevents mould and mildew growth.

6. Pest prevention

Elevating your outdoor storage with a base can deter pests from making a home beneath. Rats, mice, and insects are less likely to inhabit a shed raised off the ground.

7. Aesthetic appeal

A properly installed foundation kit can give your plastic shed a neater appearance. It helps create a seamless transition between the shed and the surrounding landscape. This, overall, enhances the overall aesthetic of your outdoor space.

Speaking of attractive appearance, would you look at this BillyOh WoodBridge II Plus! This tall walk-in shed features wide double doors. Furthermore, ventilation and a windowed front wall allow natural light into the building.

8. Maintenance ease

With a solid foundation in place, your plastic shed is less likely to shift or settle over time. This means less maintenance in the long run, as you won’t have to level or adjust the shed constantly.


It’s clear that plastic sheds do indeed require a base for optimal performance and longevity. Neglecting a proper foundation can lead to instability, moisture issues, and potential damage. By investing time and effort, you can ensure the durability of your investment!

Discover Garden Buildings Direct’s wide selection of top-quality plastic storage sheds. Among our selections are models with included foundation bases.

What’s next on your reading list: How to Weatherproof Your Plastic Shed